Question

The Dopamine molecule is capable of making strong hydrogen bonds. Edit the dopamine molecule so it can no longer make strong hydrogen bonds.

Answer 1

roughly speaking, hydrogen bonding occurs between hydrogen involved with a polar bond and an unshared electron pair on an electronegative atom on another molecule. in light of this textbook definition, we can replace the amine group (the part that contains N-H) and the OH groups with something that doesn't contain highly polar bonds (such as a CH3 group). these will participate in hydrogen bonding between dopamine and water, among two or more dopamines, and also between dopamine and other biomolecules. so here is my attempt:

Answer 2

notice that i took over the O and N atoms because they have lone pairs that can participate in h-bonding.